
// Cloud Float...
    var $main = $cloud = mainwidth = null;
    var offset1 = 450;
	var offset2 = 0;

	var offsetbg = 0;

    $(document).ready(
        function () {
            $main = $("#mainBody");
			$body = $("body");
            $cloud1 = $("#cloud1");
			$cloud2 = $("#cloud2");

            mainwidth = $main.outerWidth();

        }
    );

    /// 飘动
    setInterval(function flutter() {
        if (offset1 >= mainwidth) {
            offset1 =  -580;
        }

        if (offset2 >= mainwidth) {
			 offset2 =  -580;
        }

        offset1 += 1.1;
		offset2 += 1;
        $cloud1.css("background-position", offset1 + "px 100px")

		$cloud2.css("background-position", offset2 + "px 460px")
    }, 70);


